Initial version (with docx)

xlsx_replacement.py

@@ -0,0 +1,34 @@
+import re
+import openpyxl
+from typing import Union, IO
+
+
+class XlsxReplacement:
+    def __init__(self, file: Union[str, IO]):
+        self.file = file
+        self.xlsx = openpyxl.load_workbook(file, read_only=True, data_only=True)
+        self.re_replace = re.compile('\[\[(?:(\w+):)?([a-zA-Z]+\d+)\]\]')
+        self.errors = []
+
+    def find_replace_text(self, text: str):
+        if '[[' not in text:
+            return text
+
+        return self.re_replace.sub(self._regex_replacement, text)
+
+    def _regex_replacement(self, match):
+        sheet, cell = match.groups()
+        if sheet is None:
+            sheet = self.xlsx.active
+        else:
+            try:
+                sheet = self.xlsx[sheet]
+            except IndexError:
+                self.errors.append('Unknown sheet {sheet}'.format(sheet=sheet))
+                return 'ERR Unknown sheet'
+        try:
+            return str(sheet[cell].value)
+        except (IndexError, ValueError):
+            self.errors.append('Unknown cell {sheet}:{cell}'.format(sheet=sheet, cell=cell))
+            return 'ERR Unknown cell'
+